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Are heavy-fermion metals Fermi liquids?

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Zeitschrift für Physik B Condensed Matter

Abstract

We present the results of specific-heat and resistivity measurements as a function of temperature, magnetic field and hydrostatic pressure on the Kondo lattice CeNi2Ge2, the heavy-fermion superconductors CeCu2Si2 and UBe13 as well as the low-carrier-density system Yb4As3. “Non-Fermi-liquid” effects in the low-temperature normalstate properties of the three former systems are consistent with the existence of a “nearby” quantum critical point, presumably of antiferromagnetic type. Yb4As3, though showing the outward appearance of a Landau-type heavy-fermion metal, behaves very differently, i.e. as an extreme two-fluid system.

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Authors and Affiliations

  1. Institut für Festkörperphysik, SFB 252, TH Darmstadt, Hochschulstrasse 8, D-64289, Darmstadt, Germany

    F. Steglich, P. Gegenwart, R. Helfrich, C. Langhammer, P. Hellmann, L. Donnevert, C. Geibel, M. Lang & G. Sparn

  2. Max-Planck-Institut für chemische Physik fester Stoffe, D-01187, Dresden, Germany

    F. Steglich

  3. Physikalisches Institut, Universität Frankfurt, Robert-Mayer-Strasse 2-4, D-60325, Frankfurt/Main, Germany

    W. Assmus

  4. Institut für Physik, Universität Augsburg, Universitätsstrasse 1, D-86159, Augsburg, Germany

    G.R. Stewart

  5. Department of Material Science and Technology, Faculty of Engineering, Niigata University, Niigata, 950-21, Japan

    A. Ochiai

Authors
  1. F. Steglich
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  2. P. Gegenwart
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  3. R. Helfrich
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  4. C. Langhammer
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  5. P. Hellmann
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  6. L. Donnevert
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  7. C. Geibel
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  8. M. Lang
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  9. G. Sparn
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  10. W. Assmus
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  11. G.R. Stewart
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  12. A. Ochiai
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Steglich, F., Gegenwart, P., Helfrich, R. et al. Are heavy-fermion metals Fermi liquids?. Z. Phys. B - Condensed Matter 103, 235–242 (1996). https://doi.org/10.1007/s002570050366

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  • DOI: https://doi.org/10.1007/s002570050366

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